Stacker mechanism for paper cutting machines



Oct. 5, 1937. G. w. MUDD 2,094,665

STACKER MECHANISM FOR PAPER CUTTING MACHINES Filed May '29, 1935 4Sheets-Sheet l Oct. 5, 193? e. w MUDD STACKER MECHANISM FOR PAPERCUTTING MACHINES Filed May 29, 19:55 4 Sheets-Sheet 2 -mfc.

Oct 5, 1937. s. w. MUDD STACKER MECHANISM FOR PAPER CUTTING MACHINESFiled May 29, 1935 4 Sheets-Sheet 3 Get. 5, 1937. G. w. MUDD STACKE'RMECHANISM FOR PAPER CUTTING MACHINES Filed May 29, 1955 4 Sheets-Sheet 4Patented Oct. 5, 1937 gains are I STACKER MECHANISM FOR PAPER CUTTINGMACHINES Garrett W. Mudd, Chicago, 111., assignor to lleters-Machinery00., Chicago, 111., a corporation of Illinois Application May 29, 1935,Serial No. 24,071

4 Claims.

In my co-pending application, Serial Number 728,369, filed May 31, 1934,there is shown and described a machine for cutting very thin, andotherwise hard to handle, paper, such as what is ",5 commonly known tothe general public .asfCellophane.

The-present invention is particularly adapted, though not necessarilylimited in its use, in connection withthe type of machine described inthe aforesaid application, and relates more particu- .larly to amechanism for receiving the sheets as i for preventing injury or damageto the sheets as the result of a portion of the feeding mechanismcontinu ng to operate when anotherportion of such feeding mechanism isrendered inactive for aninterval of time in the operation of themachine, during which interval the cutting mechanism is in operation tosever the sheets.

. rrsc is to provide improved means -for. relieving or removing from thesheets, before thesheets are delivered-to or deposited upon the 'tableor platform, puckers or wrinkles formed in the sheets by the operationof the feedmechanism thereon.

To. the attainment of these ends and the accomplishment of other new anduseful objects as will appearfthe invention consists in the features ofnovelty in substantially the construction, combihationand arrangement ofthe several parts. hereinafter more fully described and claimedand shownin the accompanying drawings illustrating this invention'and in which Il Figure l is atop plan view of a mechanism of A, further object.

I. this character constructed in accordance with the principles of thisinvention and showing a portion of a cutting mechanism co-operatingtherei with. 1

Figure 2 is a view taken on line 2-2, Figure 1, -on-an enlarged scale.

Figure 3 is a detail view in elevation of a por- .tion of the cam-shownin Figure 2, and taken from the opposite side of the cam.

Figure 4 is a vertical sectional view taken on line 4-4, Figure 1,on anenlarged scale.

Figures 5.6; and '7 are views in vertical sec- ,tion'of the receivingtable or platform and the mechanism which cooperates therewith andshowing the parts in different positions.

Figure 8 is a VlBW in elevation of a detail as taken on line 8-8, Figure1.

Referring more particularly to the drawings,

the numerals iii and ii designate two supplies or eels of the paper ormaterial 82 which is to be severed into sheets and stacked or piled.

In the present form of the invention these supplies are shown to be inthe'forrn of rolls suitably mounted. I

- The numeral i3 designates a feed roll and the numeral, M designates aco-operating feed roll, which latter is journaled in armsle supported asat it to a, suitable support, springs llia being provided which tend tomove the roll M towards and in engagement with the roll it, so that therolls will co-operate to feed the material, and between which rolls thematerial passes, being guided to the rollsover a suitable guide ill.

.The numeral. iii designates a stationary cutter with which a cutter isco-operates, and the cutter is is mounted upon a reciprocating member2i! which passes through suitable guides 25 to impart a reciprocatingmovement to the knife or cutter i9.

ihe member 26 is preferably enlarged at its lower end as at 22 and isprovided with a slot 23, through which a shaft 25% passes, and securedto the portion 22 of, the member 26 is a roller 25 with which a cam itthat is secured to a shaft 2 5, co-operates. The cam 26 is provided witha raised portion 2'! adapted to contact the roller 25 and thereby movethe member 29 with the knife E9 in one direction and against the stressof arspring .23. The spring 28 encompasses a portion of. the member 20and one end of the spring abuts one of the guides 2 i while the otherend of thespring abuts a collar 29 adjustably secured to the member 2iby means of a fastening device 30. I

It will therefore be seen that inasmuch as the material i2 passesbetween the rolls it and i l'and between the knives or cutters. i8 andit, and when the member 28 is moved in one direction by the cam 26, thesupply will be severed and as soon as the high portion 2i of the campasses out of contactwiththe roller 25, the spring 28 will move theknife or cutter B9 in the opposite direction. h Motion is imparted tothe shaft 26 from a drive shaft 3i, which latter. receives its motionfrom any suitable source of power (not shown). Secured to the shaft tifor rotation therewith is a gear 32, which meshes with a gear 33 that issecured to the shaft 2 5., and as the cam it is also secured to theshaft i l, the latter when rotated willactuate the cutter i9.

After the sheets have been cut by the cutter they are delivered to aseries of endless conveyors 34 laterally spaced from each other andwhich conveyors pass over pulleys 35 secured to a shaft 36. h

Another shaft 31 arranged parallel with the shaft 36 has secured to it avseries of laterally spaced pulleys 38 over which the endless conveyors34 respectively pass.

Arranged above the shaft 3! is a shaft 39 which has secured to it forrotation therewith a series of discs 48 that are laterally spaced fromeach other and are so arranged that the discs 48 will stand intermediateadjacent pulleys 38' and spaced laterally from each of the pulleys. Thediscs 48 and the pulleys 38 are of such diameters that the adjacentperipheral portions will overlap and thereby cause the sheets I2 to becorrugated as at M in the general direction of the line of travel of thesheets so as to impart a certain amount of rigidity to the sheets tofacilitate the delivery of the sheets on to a receiving table orplatform 42.

Intermeshing gears 43-44 are provided on the shafts 3'I39 to cause thediscs 48 and the pulleys 38 to be simultaneously rotated and to impartmotion to the endless conveyors 34.

The table or platform 42 is given a lowering movement in any suitablemanner such as by means of a rack 45, the teeth of which mesh with agear 45 that is secured to a. shaft 41 by means of a clutch mechanism48. A worm gear 49 forms a part of the clutch mechanism, and with thisworm gear 49 a'worm 58' meshes, the worm 58 being secured to a shaft 5Ifor rotation therewith.

A worm gear 52 is also secured to the shaft 5i for rotation therewith,and with this worm gear 52 a gear 53 secured to the shaft 24 forrotation therewith, meshes.

Thus it will be seen that when the shaft 24 is rotated, motion will beimparted therefrom to the shaft 5I, thence to the gear 49 which mesheswith the rack 45, and this will impart a lowering movement to the tableor platform 42.

The platform may be raised in any suitable manner by means of a treadle54 pivotally mounted as at 55, which depresses a member 56 to which acable 5'! is secured, the cable passing over a pulley 58 and then beingsecured as at 59 to a member 58 carried by the rack 45.

When it is desired to raise the platform after it has been lowered, thetreadle 54 is depressed, causing the cable 51 to raise the platform.During the lowering movement the actuating motor (not shown) iscontrolled by means of stops BI-BZ adjustably secured to a rod 83 thatis secured as at 64 to the platform or support 42. This rod 63 passesthrough an actuating member 65 of a switch device 86 that controls theoperation of the motor.

All of the above referred to parts constitute a portion of the subjectmatter of the aforesaid application and are only explained with the present invention in order that a full and clear understanding of thecooperation of the present device with the aforesaid mechanism may behad.

It has been found that in handling very thin paper of this character theedge of the sheet has a tendency to curl up after it has been severed bythe cutter, which interferes with the proper stacking and piling of thesame upon the table or platform 42.

In order therefore to overcome this objection and to hold the edge ofthe paper flat and down upon the pile upon the table or platform 42, thefollowing mechanism has been provided.

Arranged at the forward end of the platform or support 42, are stops 6'!which are adjustably secured to side rails 88 by means of fasteningscrews 69 and constitute abutments against which the forward edge of thesheets I2 'strike.

An upright stationary member 18 is secured at the inner end of the tableor support 42, as shown more clearly in Figure 4, and between thesestops 6'! and 18 the sheets I2 will be deposited to be piled orsuperposed on support 42.

The numeral 'II designates a bar or rod which extends entirely acrossthe platform or support 42, which is adapted to be moved vertically andthe ends of the rod project into and move in guides I2 in uprights I3.Pivotally connected by one end to the rod II, preferably adjacent theends of the rod, are links 14, and these links in turn are pivotallyconnected at their other ends as at I5 to links I6. The links 16 are inturn secured as at I! to a rock shaft I8, and on one end of the shaft I8is arranged a crank arm I9 to which a rod 88 is pivotally connected asat 8|. The other end of the rod 88 is pivotally connected as at 82 to anextension 83 of an arm 84 that is pivotally mounted as at 85 to a fixedsupport. A roller 88 is carried by the arm 84 and this roller 86 engagesthe periphery of a rotatable member 81' that is secured to the shaft 24for rotation therewith, and the member 81 is provided with a highportion 88 that is adapted to contact the roller 85 to rock the member84 about its pivot 85 and through the medium of the rod 88 rock theshaft 18 to raise the member II, for a purpose to be hereinafter setforth, and after the roller 88 passes off of the high portion 88 of thecam or member 81, the bar or rod II will engage and rest upon the edgeof the pile of sh-eetsl2 upon the table or platform 42.

A rod or bar 89, similar to the bar or rod II, also extends across theplatform or support 42 and is arranged parallel to the bar H, the endsof the bar 89 being adapted to move in guides 98 in the uprights I3.Pivotally connected to the bar 89, preferably adjacent its ends, arelinks 9| and the free ends of the links 9| are connected by arms 92 to arock shaft 93. A crank arm 94 is provided on one end of the rock shaft93, and a rod 95 is pivotally connected as at 96 to the arm 94, by oneend, and is also pivotally connected to a member 97, which in turn ispivotally supported as at 98. A roller 99 is carried by the member 91and rests and moves against the periphery of a cam member I 88, which issecured to the shaft 24 for rotation therewith. This member or cam I88is provided with a recess I III in its periphery, of a sufficient sizeto admit the roller 99.

The member or cam I88 is of such a size and construction as toreciprocate the bar or rod 89 in the guideways 98 in the members 13, andthe two cam members 81 and I88 are so arranged that the two bars or rodsII and 89 will be moved vertically in opposite directions. That is tosay, when one is raised the other will be lowered and vice versa.

The rods or members II and 89 are preferably arranged adjacent the innerend of the support or platform 42 and preferably adjacent the stationarymember I8, the bar or rod II being arranged in closed proximity to theinner end of the sheets I2 upon the platform 42 than the bar 89, andboth rods are arranged in proximity to the discs 48 and the pulleys 38.

The normal position of the rods 'II--89 with respect to each other is asshown in Figure 5. That is to say, the rod 89 will be elevated above therod II and the latter will rest against the sheets I2 on the support 42and in proximity to the inner end thereof. When the sheet is severed bythe cutter I9 and it is delivered on to the table or support 42 it willpassbetween the rods 'II andtQ, and when the sheet is deliveredonto-thepile, the inner edge of the sheet will rest uponpositionshown in FigureI02 to be bent upwardly between the bars or rods 'I-I-89; and as the rodII is further elevated-and the rodIS further lowered, the edge of theportion I02 o-f the'sheets-I2 will: pass out of engagement-with the baror rod II and beneath the same, being moved downwardly by the bar or rod89-until the bars or rods II-89 reach'the position shown in Figure "I.

The bar- TI will then belowered'and the bar 89 will be raised to theposition shown in Figure 5, sothat the bar or rod II will engagethe-pile of sheets I2 and hold the same down.

This operation will be continued until all of the sheets have been piledupon the support or platform 42, thelatterbeing lowered to receive thesheets.

Connectedto the harm rod 89 and at any point intermediate the endsthereof is a rod I03 which extends-lengthwise of the support or platform42 and at right angles to thebar or rod 89. The

free extremity of the bar I03 passes through a slot- I04 in anupstanding projection I05 secured to a machine frame, and serves to holdby the pressure of its weight the body of the sheets in position.

' As before stated, the sheets I2 are temporarily corrugated before theyare delivered on to the support or table 42,' but when they reach thetable or support or the top of the pile, the sheet will aright itselfand willfall flat upon the pile.

Securedrespective to the shafts 31 and-39 for rotation therewith, arefriction creating rollers I06-I I'which may be of any desired length,and

anynumber of these'rollers may be provided. It.

has been-found, however, that one on each of the shafts will besufficient and-they may be located atany-point on the shaft 50- thatthey will be:

disposed one above the other with their peripheries spaced only for asufficient distance to permit the sheets I2 to pass between the rolls.

These rolls may be constructed of material preferably resilientmaterial, such as rubber, and their peripheries may be smooth orserrated, so as to grip the sheets as they pass be tween the rolls andadvance and deliver the sheets after they have been severed by thecutters I8--I 9.

The two shafts 31 and 39, as before stated, are

geared together by means of the gears 43-44, and

motion is impartedto these-shafts preferably by means of a-pulleyI08secured to one of the shafts, preferably'the shaft 31, over which anendless belt [Dil -passes. ley-I I0-secured to the shaft 3I for rotationthere- -with, so-that when the shaft 3| is rotated, the

be rotated, causing the shafts, 31-49 will also IOI3-I0'I as well as therotation of the rollers endless conveyors 34.

Reference is here made to Patent No. 2,045,064

for a description of a driving means for rolls I3 that there is atendency of I willmove the barsor rods 'I-I -89 from the position'showninFigure tothe 6, causing the inner end any suitable The belt alsopassesover a pulby the reciprocating cutter I9 co-operating with. thecutter I8, it will be manifest that the sheetsor material will be placedunder tension between the rollers I96and I01 and the rolls I3 and It,with the result that the material between these co-operating rolls,before. the-sheets are severed,

will be slightly puckered or wrinkled. Therefore, in order to provide ameans to compensate such I puckering or wrinkling and to allow thesheets to straighten themselves out before they pass between the rollersI06 and I07, one of therolls I3-l4 is provided with a series of cut awayorflat peripheral portions iII, spaces or escapement areas, portions maybe arranged at any'point throughout the length of the roll I4 and may beof any desired length and width, and are also arranged.circumferentially about the roller and spaced laterally from each otheras shown more clearly in Figure l of the drawings. The slight puckeringor wrinkling of the paper is due to the unequal strain placed thereon bythe central feed rollers I06 and I01 and the corrugating means at thesides of these rollers, as discs 40 and pulleys 38.

As soon as the flat assume positions above the sheet, it will bemanifest that pressure will not be exerted upon the sheets by theseportions, and as the flat portions are not only arrangedcircumferehtially but spirally about the'roll, it will be manifest thatthe wrinkles or puckers or uneven portions of,

the sheet will be straightened out.

During the interval of time that the rolls I3 and I4 are interrupted intheir movement or during the interval between the intermittent steps ofrotation of these rolls, andas the rollers I06 and ID'I are continuouslyrotating, and in order to provide a means for preventing the fromdamaging. or tearing the;

rollers IOG-I 01 sheets, the belt I09 which is-also continuously drivenfrom. the shaft3I through the pulley I II], will slip aboutthe-pulley-I08, the shafts 31 and 39 through the medium of the rollersMite-I01 being held against rotation by the frictionexerted by therollers I06-I0'I upon the-sheets I2 and the holding of the. material bythe rolls I3 and I4,

before the sheets are severed by. the cutter.

Immediately upon theseverance of thesheet;

from the supply by the cutter I9; the shafts 31 and 39 togetherwith therollers IOIi-I0l will be rotated by the belt .I09 andthe sheets will be1 ejected or delivered on to the piling platform or table 42'.

Obviously, all of the parts will'be so connected that they willoperatein timed relation with respect to each other.

It is .-thought that the operation of the device.

I4 during the interval.

constituting relief" and which. cut away previously described.

or cut away portions III mittently rotated in any suitable manner, butpreferably by means of the mechanism described in my above referred toco-pending application.

The shafts 31 and 35, together with the rollers Hit-4M are continuouslyrotated through the medium of the belt i913 passing over the pulley ill]on the constantly driven shaft St.

The, receiving platform or table 52 is lowered as the sheets F2 arepiled thereupon, by means of the driving connection between the shaft 24and the gear 35 with the intermediate clutch mechanism 48, the gear llmeshing with the rack Q5.

The material is passed between the. rolls i3 and i4, between the cuttersi8 and i9, and between the rollers i% ii 'i, as well as between theother co-cperating corrugating devices "espectively secured to theshafts 3? and 39. The material is fed to the rollers ltd-it'l by meansof the endless conveyors 3 Assuming the parts to be in the positionshown in Figure 4, the rollers ice-4c"! will be rotating while the rolls5% and i i will be at rest. During this interval of rest the cutter iiiwill be actuated to sever the material into the sheets i2. One end ofthe severed sheet being disposed between the rollers iiifiiill, atension will be created upon the material before it is cut into sheets.After the sheets have been cut, the rollers Hit-4t]? will deliver thesame on to the table or platform 42 between the bars or rods ii-EQ.

After the sheets have fallen upon the table or platform, one edge of therecently severed sheets will rest upon the bar or rod ii. lhese bars orrods ll-89 will then be given a vertical move ment in oppositedirections, causing the bar or rod H to be elevated, while the bar orrod is lowered into the position shown in Figure 6. This movement ofthese bars or rods will continue until they have passed each other,causing the edge of the sheets i 2 to be bent upwadly as at I92, shownin Figure 6. When the bar or rod H passes out of contact with the edgeof the sheets, the bar or rod 89 together with the rod Hi3 will belowered to rest upon the top of the pile and thereby hold the sheetsdown for a short period of time, as shown in. Figure '7.

The vertical movements of the rods ii and 89 will then be reversed andthey will move from the position shown in Figure 7 back to the positionshown in Figure 5, until the bar or rod it engages and rests upon thepile adjacent the inner edge thereof, and the bar or rod 89 will beraised to its uppermost position above the bar or rod if so as to permitthe sheets to be delivered to the support or-table 42 therebetween, asshown more clearly in Figure 4.

After the severed sheets have been deposited upon the pile, the table orplatform 82 will be lowered to receive additional sheets.

When the table or platform 52 has reached the limit of its loweringmovement, it may be raised again to the limit of its upward movement bythe actuation of the treadle E i, and through the medium of the cable5?.

As the table or platform 32 reaches the limit of its lowermost movement,the collar iii on the rod 63 will engage and actuate the switch handle65 to stop the motor, but when the table platform 42 is raised and as itreaches the limit of its uppermost movement, the collar 62 on the rod 63will engage the switch handle 65 and move it verse to the direction offeeding movement of the sheet to the table and between which members thesheet is delivered to the table, means for moving said members past eachother with the sheet therebetween and in directions transverse to thedirection of feeding movement of the sheets, said m mbers being disposedadjacent one edge of the sheets on the table, an extension on one ofsaid members extending over and adapted to engage and rest againstanother portion of the piie, and guiding means for the end of suchextension.

2. In a stacking mechanism of the character described for stackingsheets of comparatively thin material, a receiving support, means fordelivering to the support the sheets to be stacked, means operating uponthe sheets for bending or defiecting'an edge of the sheet to flatten outthe same and cause it to lie flat upon the pile on the support, the lastrecited means embodying laterally extending and longitudinally spacedmembers between which the edge of the sheets are projected, and meansfor vertically moving said members past each other with the edge of thesheet therebetween.

3. In a stacking mechanism of the character described for stackingsheets of comparatively thin material, a receiving support, means fordelivering to the support the sheets to be stacked, means operating uponthe sheets for bending or deflecting an edge of the sheet to flatten outthe same and cause it to lie fiat upon the pile on the support, the lastrecited means embodying laterally extending and longitudinally spacedmembers between which the edge of the sheets are projected, and meansfor vertically moving said.

members past each other with the edge of the sheet therebetween, aportion of the last recited means also operating to remove one of saidmembers from beneath the sheet on the pile.

'4. a stacking mechanism of the character described stacking sheets ofcomparatively thin material, a receiving support, means for deliveringto the support the sheets to be stacked, means operating upon the sheetsdeflecting an edge of the sheet to flatten out the same and cause it tolie flat upon the pile on the support, the last recited means embodyinglaterally extending and longitudinally spaced members between which theedge of the sheets are projected, and means for vertically moving saidmembers past each other with the edge of the sheet therebetween,aportion of the last recited means also operating to remove one of saidmem bers from beneath the sheet on the pile, said members successivelyengaging and resting upon the top of the pile to hold down the sheets.

GARRETT W. MUDD.

for bending or

